21 students were selected for an informal study about a student study skills; 7 first-year, 7 second-year, and 7 third-year undergraduates were randomly selected. The students were given a study skills assessment having a maximum score of 100. We are interested in whether or not a difference exists somewhere between the three different year levels.

Year 1 Year 2 Year 3
82 71 74
93 62 73
61 85 87
74 94 91
69 78 56
70 66 78
53 71 87

Write the hypotheses for testing for a difference between the average score of three different year levels.

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.

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